For the price, this can't be beat. A mere $3 will get you into the Plano city water park, and children six and under are admitted free. This park with slides, fountain-filled train rides, dumping buckets and a zero-depth entry ramp meets all the standards set by its more expensive private cousins. An indoor pool is also available at the same location with 50-meter swimming lanes. The hours at this place vary by season, so be sure to call in advance.